volume_ui.cpp

// Copyright (c) 2025 Yasushi
// Licensed under the MIT License. See LICENSE for details.

#include "volume_ui.h"

#include <algorithm>

#include "logging.h"

namespace VolumeUI {

void draw(uint8_t vol) {
  const int screenW = M5.Display.width();
  const int screenH = M5.Display.height();
  int y0 = screenH - VOLUME_UI_HEIGHT;
  if (y0 < 0) y0 = 0;
  const int x0 = 20;
  const int x1 = screenW - 20;
  const int barY = y0 + (VOLUME_UI_HEIGHT / 2);

  SemaphoreHandle_t mutex = Logging::displayMutex();
  if (!mutex || xSemaphoreTake(mutex, portMAX_DELAY) == pdTRUE) {
    M5.Display.fillRect(0, y0, screenW, screenH - y0, 0x000000U);
    M5.Display.fillRect(x0, barY - 4, x1 - x0, 8, 0x444444U);  // バー

    float t = vol / 255.0f;
    int knobX = x0 + static_cast<int>(t * (x1 - x0));
    M5.Display.fillCircle(knobX, barY, 10, 0xFFA500U);  // ノブ（オレンジ）

    M5.Display.setTextColor(0xFFFFFFU);
    M5.Display.setCursor(x0, y0 + 5);
    M5.Display.printf("Vol: %3u", vol);

    if (mutex) xSemaphoreGive(mutex);
  }
}

bool handleTouch(uint8_t& vol) {
  int32_t x, y;
  if (!M5.Display.getTouch(&x, &y)) return false;

  const int screenW = M5.Display.width();
  const int screenH = M5.Display.height();
  const int y0 = std::max(0, screenH - VOLUME_UI_HEIGHT);
  if (y < y0) return false;  // ログ領域は無視

  const int x0 = 20;
  const int x1 = screenW - 20;
  if (x1 <= x0) return false;

  x = std::max(x0, std::min(static_cast<int>(x), x1));
  uint8_t newVol = static_cast<uint8_t>((x - x0) * 255.0f / (x1 - x0));
  if (newVol == vol) return false;

  vol = newVol;
  M5.Speaker.setVolume(vol);
  draw(vol);
  return true;
}

}  // namespace VolumeUI